The owner of this 2004 Mazda RX-8 spent three years of weekends and late nights rebuilding it from the ground up. The owner considering swapping a Honda K20 or K24 inline-four but settled on a turbocharged 1.8 L (AVJ) inline-four from an Audi A4 B6. The engine features Siemens Deka 630 cc injectors, Bosch Motronic ME 7.5 ECU, XSPower exhaust manifold, and K03RS6 turbocharger. The owner estimates the combination is good for 300 horsepower. Custom mounts place the engine further back which helped with weight balance but required some firewall trimming. He swapped the factory RX-8 six-speed to a five-speed model with an adapter plate and upgraded clutch. The car maintains stock suspension and brakes albeit resorted and/or rebuilt.
Source: RX-Klub.pl (build thread) and SopelXL via Piotr
For sale?
I don’t believe so.
hello friends
can help with loom conections
what do you mean?
Where is the gearbox adapter from please?
I did it myself. 8mm aluminium
Did you keep cad drawing or anything? How much to build me one? Thanks
I’m interesting to fix me an adapter plate and I will pay you… Text me please…
Great project!! I want to make one fore me, Is there a way to send me drawings for the adapter plate and The engine mounts? I Will pay you if you want, my email is g.georgiev77@yahoo.com or viber +359988911855
How much to make and post the adapter plate also what flywheel and clutch parts are you using
Ive figured out how to make the plate for the gearbox but could you please tell why did you change the 6 speed gearbox whit 5 speed one and is the 5 speed from the rx8 original or you’ve used another one … if yes from what car ? Thank you in advance
Because of longer gear ratios than in 6 speed.
5 speed RX-8 gearbox is better for this engine (max 7200rpm) but in my opinion still too short 140km/h – with 4000rpm on 5 gear and max speed 250km/h. because of this i will swap rear differential from automatic RX-8 (4.3) in manual version is 4.44
I’ll like to purchase one of those adapter plate as I’ve started the same build . You can contact me at
diagvale@gmail.com
Thanks,any heads up will also be much appreciated
Did you get all thr cluster working and how?
Hi there guys,
i am looking to do this also.
i have the rx8 and audi tt 230hp 1.8 20 valve engine.
what clutch components are required for this ??
any info would be greatly appreciated.
Rory